JP2016050725A - Freezer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a freezer which facilitates cooling of heating components while inhibiting increase of costs.SOLUTION: An air conditioner 100 includes: a printed wiring board 41; a fifth pipeline P5 in which a refrigerant flows; and a heat sink 60. In the printed wiring board 41, a power device PD1 and a coil component CP1, which are the heating components, are mounted on a major surface 411. The heat sink 60 is located adjacent to the printed wiring board 41 and has a first plane part 611 and a second plane part 612. The first plane part 611 includes: a first contact part 613 thermally connected with the power device PD1; and a second contact part 614 thermally connected with the coil component CP1. The second plane part 612 includes a pipeline contact part 621. The pipeline contact part 621 contacts with a refrigerant pipeline RP. A first distance d1, which is the shortest distance between the first contact part 613 and the major surface 411, is the same as a second distance d2, which is the shortest distance between the second contact part 614 and the major surface 411.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a refrigeration apparatus.

  Conventionally, there are refrigeration apparatuses having heat-generating parts such as power devices and coil parts. For example, in Patent Document 1 (Japanese Patent Laid-Open No. 2010-175224), an air unit having a power device such as a power transistor mounted on a substrate and a coil component such as a reactor arranged away from the substrate in an outdoor unit. A harmony machine is disclosed. In such a refrigeration apparatus, it is necessary to cool the heat-generating components during operation to suppress performance degradation. In the air conditioner disclosed in Patent Document 1, the power device is cooled by a radiator, and the coil component is naturally cooled by the air flowing in the outdoor unit.

  When cooling a heat-generating component, a temperature rise is suppressed by using a radiator rather than natural air cooling. However, generally, a coil component generates less heat than a power device. Cooled by natural air cooling. However, with natural air cooling alone, depending on the situation, there may be cases where the coil component is not sufficiently cooled. Lowering is done.

  However, if the winding of the coil component is made thick, the entire coil component becomes large and the weight increases in order to secure the number of turns, so that mounting on the board becomes difficult. And when a coil component is not mounted in the board | substrate with which the power device is mounted like patent document 1, the harness which electrically connects the electrical component mounted in a board | substrate and a coil component will be needed. Cost.

  For this reason, from the viewpoint of suppressing an increase in cost, it is preferable to configure the coil component compactly and mount the coil component and the power device on the same substrate. Then, in order to make the coil component compact, it is preferable to cool the coil component with a radiator as well as the power device.

  On the other hand, when a radiator for cooling the coil components is provided separately from the radiator for cooling the power device, it costs high. Further, when the power device and the coil component are cooled by the same radiator, there is a concern about an increase in cost in that the radiator is increased in size in order to ensure the cooling performance of the radiator.

  Thus, an object of the present invention is to provide a refrigeration apparatus that promotes cooling of heat-generating components while suppressing an increase in cost.

  A refrigeration apparatus according to a first aspect of the present invention includes a substrate, a refrigerant pipe, and a radiator. The substrate is mounted with a plurality of heat generating components. In the refrigerant pipe, the refrigerant flows inside. The radiator contacts the heat generating component and the refrigerant pipe. The substrate is mounted with a power device and a coil component as heat generating components on the main surface. The radiator is adjacent to the substrate. The radiator has a back side surface and a front side surface. The back side surface includes a first contact surface and a second contact surface. The first contact surface is thermally connected to the power device. The second contact surface is thermally connected to the coil component. The front side includes a pipe contact portion. The pipe contact portion is in contact with the refrigerant pipe. The shortest distance between the first contact surface and the main surface and the shortest distance between the second contact surface and the main surface are the same.

  In the refrigeration apparatus according to the first aspect of the present invention, the coil component is thermally connected to the second contact surface of the radiator. Thereby, even if a coil component does not employ a particularly thick winding, the temperature rise is suppressed. As a result, the coil component can be configured in a compact manner, and the coil component can be mounted on the substrate on which the power device is mounted. Therefore, the harness for connecting the coil component and each electrical component, which is necessary when the coil component is arranged away from the substrate, can be omitted, and the cost is suppressed.

  In the refrigeration apparatus according to the first aspect of the present invention, the radiator includes the shortest distance between the first contact surface of the radiator and the main surface of the substrate, the second contact surface of the radiator and the main surface of the substrate. And the shortest distance to the refrigerant pipe are in contact with each other. Thereby, even if a heat radiator is not comprised large especially, it becomes easy to satisfy heat dissipation performance sufficient to cool a power device and a coil component. Therefore, the cost is suppressed and the cooling of the heat generating component is promoted.

  The refrigeration apparatus according to the second aspect of the present invention is the refrigeration apparatus according to the first aspect, and the refrigerant pipe includes a vertical portion. The vertical portion extends in the vertical direction. The vertical portion contacts the pipe contact portion. The thickness direction of the substrate extends along the horizontal direction.

  In the refrigeration apparatus according to the second aspect of the present invention, the thickness direction of the substrate extends along the horizontal direction, and the vertical part of the refrigerant pipe contacts the pipe contact part of the radiator. Thereby, the vertical part of refrigerant piping supports the radiator which is easy to receive the load from a board | substrate via a 1st contact surface and a 2nd contact surface in a contact part with a pipe contact part. As a result, the substrate on which the power device and the coil component are mounted and the radiator can easily maintain the posture at the time of installation. Therefore, the rigidity is improved.

  The refrigeration apparatus according to the third aspect of the present invention is the refrigeration apparatus according to the first aspect or the second aspect, and the substrate is arranged such that three or more heat generating components are arranged in the vertical direction on the main surface. Thereby, it becomes possible to arrange a heat-emitting component along the piping contact part of a radiator. As a result, heat exchange between the heat generating component, the radiator, and the refrigerant pipe is promoted. Therefore, cooling of the heat generating component is further promoted.

  A refrigeration apparatus according to a fourth aspect of the present invention is the refrigeration apparatus according to any one of the first to third aspects, wherein the coil component has a core. The core is wound with a coil. A flat part is provided in the core. The flat surface portion is in contact with the second contact surface.

  In the refrigeration apparatus according to the fourth aspect of the present invention, the core of the coil component is provided with a flat portion that comes into contact with the second contact surface. Thereby, the heat transfer area of a coil component and a heat radiator is ensured, and heat exchange is accelerated | stimulated. Therefore, cooling of the coil component is promoted.

  A refrigeration apparatus according to a fifth aspect of the present invention is the refrigeration apparatus according to any one of the first to third aspects, and the coil component has a coil. A heat transfer member is disposed between the coil and the second contact surface. The second contact surface is thermally connected to the coil component through the heat transfer member.

  In the refrigeration apparatus according to the fifth aspect of the present invention, the heat transfer member is disposed between the coil of the coil component and the second contact surface of the radiator, and the second contact surface and the coil component serve as the heat transfer member. Through a thermal connection. This further promotes heat exchange between the coil component and the radiator. Therefore, cooling of the coil component is further promoted.

  In the refrigeration apparatus according to the first aspect of the present invention, the coil component can be made compact, and the coil component can be mounted on the substrate on which the power device is mounted. Therefore, the harness for connecting the coil component and each electrical component, which is necessary when the coil component is arranged away from the substrate, can be omitted, and the cost is suppressed. Moreover, even if a heat radiator is not comprised large especially, it becomes easy to satisfy heat dissipation performance sufficient to cool a power transistor and coil components. Therefore, the cost is suppressed and the cooling of the heat generating component is promoted.

  In the refrigeration apparatus according to the second aspect of the present invention, the substrate on which the power device and the coil component are mounted and the radiator can easily maintain the posture at the time of installation. Therefore, the rigidity is improved.

  In the refrigeration apparatus according to the third aspect of the present invention, the heat generating components can be arranged along the pipe contact portion of the radiator, and heat exchange between the heat generating components, the radiator and the refrigerant piping is promoted. Therefore, cooling of the heat generating component is further promoted.

  In the refrigeration apparatus according to the fourth aspect of the present invention, cooling of the coil components is promoted.

  In the refrigeration apparatus according to the fifth aspect of the present invention, cooling of the coil components is further promoted.

The schematic block diagram of the air conditioner which concerns on one Embodiment of this invention. The front view of an outdoor unit (illustration is omitted about the 1st front board and the 2nd front board). III-III sectional view taken on the line of FIG. The schematic block diagram of an actuator drive unit. The enlarged view of A part of FIG. The external view at the time of seeing A section of Drawing 3 from the front (illustration is omitted about the 5th piping and a cover part). The external appearance perspective view of coil parts (illustration is omitted about a lead). The top view which shows the state which installed the coil components which concern on the modification H on the printed circuit board. The top view which shows the state which installed the coil components which concern on the modified example I to a printed circuit board. The front view of the heat sink concerning the modification N. FIG. The top view of the heat sink concerning the modification N. FIG.

  Hereinafter, an air conditioner 100 according to an embodiment of the present invention will be described with reference to the drawings. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention, and can be modified as appropriate without departing from the scope of the invention. In the following embodiments, directions such as up, down, left, right, front (front), and back (rear) mean the directions shown in FIGS. 2, 3, and 5 to 11.

(1) Air conditioner 100
FIG. 1 is a schematic configuration diagram of an air conditioner 100 according to an embodiment of the present invention. The air conditioner 100 is a refrigerant pipe type air conditioner, and realizes air conditioning in a target space by performing a vapor compression refrigeration cycle operation. The air conditioner 100 has a cooling mode, a heating mode, and the like as operation modes, and performs a cooling operation, a heating operation, and the like according to the selected operation mode. The air conditioner 100 includes an indoor unit 10 and an outdoor unit 20. In the air conditioner 100, the indoor unit 10 and the outdoor unit 20 are connected by a liquid refrigerant pipe LP and a gas refrigerant pipe GP, thereby forming a refrigerant circuit.

(1-1) Indoor unit 10
The indoor unit 10 is, for example, a so-called ceiling-embedded type, ceiling-suspended type, or wall-mounted type indoor unit. The indoor unit 10 mainly includes an indoor heat exchanger 11, an indoor fan 12, an indoor electrical component unit 13, and the like.

  The indoor heat exchanger 11 functions as a refrigerant evaporator during the cooling operation, and functions as a refrigerant condenser (or heat dissipation heat exchanger) during the heating operation. The liquid side of the indoor heat exchanger 11 is connected to the liquid refrigerant pipe LP, and the gas side of the indoor heat exchanger 11 is connected to the gas refrigerant pipe GP.

  The indoor fan 12 is a blower that generates an air flow that flows into the indoor unit 10 and flows out of the indoor unit 10 after passing through the indoor heat exchanger 11. The indoor fan 12 is, for example, a centrifugal fan or a multiblade fan, and is connected to the output shaft of the indoor fan motor 12a. The indoor fan 12 is driven in conjunction with the indoor fan motor 12a.

  The indoor electrical component unit 13 is a unit in which a plurality of electrical components are mounted on a substrate. The indoor electrical component unit 13 mainly includes an indoor unit control unit 14 and an indoor fan motor drive unit 15.

  The indoor unit control unit 14 includes a microcomputer composed of a CPU, a memory, and the like. The indoor unit control unit 14 is connected to the outdoor unit control unit 42 via the cable C1, and transmits and receives signals to and from each other. When the indoor unit controller 14 receives a predetermined signal from the outdoor unit controller 42 or a remote controller (not shown), the indoor unit controller 14 performs processing corresponding to the signal.

  The indoor fan motor drive unit 15 is a motor drive circuit for controlling the operation of the indoor fan motor 12a. The electric components included in the indoor fan motor drive unit 15 include heat generating components that generate heat when energized.

(1-2) Outdoor unit 20
FIG. 2 is a front view of the outdoor unit 20 (the first front plate 214 and the second front plate 215 are not shown). 3 is a cross-sectional view taken along line III-III in FIG.

  The outdoor unit 20 is installed outdoors. The outdoor unit 20 is configured to discharge air from the front surface to the outside after sucking outdoor air from the back surface and the right side surface during operation. The outdoor unit 20 has a substantially rectangular parallelepiped outdoor unit casing 21.

  A partition plate 210 that extends in the vertical direction is disposed inside the outdoor unit casing 21. The partition plate 210 partitions the internal space of the outdoor unit casing 21 to the left and right to form the blower chamber SP1 and the machine room SP2 in the outdoor unit casing 21. In the present embodiment, the blower chamber SP1 is formed on the right side of the partition plate 210 and the machine chamber SP2 is formed on the left side of the partition plate 210. However, the left and right sides may be reversed.

  The outdoor unit casing 21 includes a bottom plate 211, a first side plate 212, a second side plate 213, a first front plate 214, a second front plate 215, and a top plate 216.

  The bottom plate 211 is a plate-like member that constitutes the bottom surface portion of the outdoor unit casing 21. On the lower side of the bottom plate 211, installation legs 217 fixed to the field installation surface are provided.

  The first side plate 212 is a plate-like member that constitutes the right side surface portion of the outdoor unit casing 21. The first side plate 212 is formed with a suction port (not shown) for taking outdoor air into the outdoor unit casing 21.

  The second side plate 213 is a plate-like member that constitutes a part of the left side surface portion of the outdoor unit casing 21 and a part of the back surface portion. The second side plate 213 is formed with an inlet (not shown) for taking outdoor air into the outdoor unit casing 21.

  The first front plate 214 is a plate-like member that constitutes the front portion of the blower chamber SP1 of the outdoor unit casing 21. The first front plate 214 is formed with an outlet (not shown) for discharging air from the outdoor unit casing 21.

  The second front plate 215 is a plate-like member that constitutes a part of the front surface portion and the left side surface portion of the machine room SP2 of the outdoor unit casing 21.

  The top plate 216 is a plate-like member that constitutes the top surface portion of the outdoor unit casing 21.

  The outdoor unit 20 includes a refrigerant pipe RP, a compressor 22, a four-way switching valve 23, an outdoor heat exchanger 24, an outdoor fan 25, an expansion valve 26, and a liquid side closure inside the outdoor unit casing 21. It has a valve 27, a gas side closing valve 28, an outdoor electrical component unit 40, and a heat sink 60.

(1-2-1) Refrigerant piping RP
Refrigerant piping RP is copper piping, for example, and a refrigerant passes through the inside. Specifically, the refrigerant pipe RP includes a first pipe P1, a second pipe P2, a third pipe P3, a fourth pipe P4, a fifth pipe P5, and a sixth pipe P6.

  The first pipe P <b> 1 is a refrigerant pipe that connects the four-way switching valve 23 and the gas side closing valve 28. The second pipe P <b> 2 is a refrigerant pipe that connects the suction port of the compressor 22 and the four-way switching valve 23. The third pipe P <b> 3 is a refrigerant pipe that connects the discharge port of the compressor 22 and the four-way switching valve 23. The fourth pipe P4 is a refrigerant pipe that connects the four-way switching valve 23 and the gas side of the outdoor heat exchanger 24. The fifth pipe P <b> 5 is a refrigerant pipe that connects the liquid side of the outdoor heat exchanger 24 and the expansion valve 26. The sixth pipe P6 is a refrigerant pipe that connects the expansion valve 26 and the liquid side closing valve 27.

  Here, the fifth pipe P5 includes a first vertical part 31 and a second vertical part 32 extending in the vertical direction (up and down direction) between one end and the other end, and a U-bent folded part 33. Have. A part of the first vertical part 31 and the second vertical part 32 is accommodated in a refrigerant jacket 62 (described later) of the heat sink 60. The folded portion 33 has one end connected to the upper end of the first vertical portion 31 and the other end connected to the upper end of the second vertical portion 32.

(1-2-2) Compressor 22
The compressor 22 is a device that sucks low-pressure gas refrigerant, compresses it, and discharges it. The compressor 22 is disposed in the machine room SP2. The compressor 22 has a sealed structure in which a compressor motor 22a is built. The compressor motor 22a is, for example, a three-phase brushless DC motor. Further, the compressor 22 has a positive displacement type compression element (not shown) such as a rotary type or a scroll type. The compression element is connected to the output shaft of the compressor motor 22a and is driven in conjunction with the compressor motor 22a. The compressor 22 is supplied with a drive voltage from an actuator drive unit 43 (described later) to the compressor motor 22a. Further, the capacity can be varied by adjusting the rotation speed of the compressor motor 22a by an inverter control unit 51 (described later).

(1-2-3) Four-way selector valve 23
The four-way switching valve 23 is a switching valve for switching the direction in which the refrigerant flows when switching between the cooling operation and the heating operation. In the cooling operation, the four-way switching valve 23 is connected to the discharge side of the compressor 22 and the gas side of the outdoor heat exchanger 24 and to the suction side of the compressor 22 and the gas side closing valve 28. Thus, the flow path is switched (see the solid line in the four-way switching valve 23 in FIG. 1). In the heating operation, the four-way switching valve 23 is connected to the discharge side of the compressor 22 and the gas side shut-off valve 28, and is connected to the suction side of the compressor 22 and the gas side of the outdoor heat exchanger 24. Thus, the flow path is switched (see the broken line in the four-way switching valve 23 in FIG. 1).

(1-2-4) Outdoor heat exchanger 24
The outdoor heat exchanger 24 is, for example, a cross fin tube type or microchannel type heat exchanger. The outdoor heat exchanger 24 has a substantially L shape in plan view, and is disposed along the right side surface and the back surface of the outdoor unit casing 21 in the blower chamber SP1. The outdoor heat exchanger 24 functions as a refrigerant condenser (or heat dissipation heat exchanger) during the cooling operation, and functions as a refrigerant evaporator during the heating operation.

(1-2-5) Outdoor fan 25
The outdoor fan 25 is a centrifugal fan, for example. The outdoor fan 25 is disposed in the blower room SP1. The outdoor fan 25 is connected to the output shaft of the outdoor fan motor 25a and is driven in conjunction with the outdoor fan motor 25a. When driven, the outdoor fan 25 generates an air flow that flows into the interior of the outdoor unit casing 21 from the outside, passes through the outdoor heat exchanger 24, and then flows out of the outdoor unit casing 21.

(1-2-6) Expansion valve 26
The expansion valve 26 depressurizes the high-pressure refrigerant. The expansion valve 26 is a motor-operated valve whose opening degree is adjusted according to, for example, an operating situation. The expansion valve 26 has one end connected to the fifth pipe P5 and the other end connected to the sixth pipe P6.

(1-2-7) Liquid side closing valve 27, gas side closing valve 28
The liquid side closing valve 27 and the gas side closing valve 28 are manual valves that are opened and closed when the refrigerant is charged or pumped down.

(1-2-8) Outdoor electrical equipment unit 40
The outdoor electrical component unit 40 is disposed in the machine room SP2. The outdoor electrical component unit 40 is a unit including a plurality of electrical components. The outdoor electrical component unit 40 mainly includes a printed circuit board 41, an outdoor unit control unit 42 mounted on the printed circuit board 41, and an actuator drive unit 43 that is also mounted on the main surface 411 of the printed circuit board 41. Yes.

(1-2-8-1) Printed circuit board 41
The printed circuit board 41 (corresponding to a “board” in the claims) is a plate-like member on which a predetermined circuit pattern is formed, and is arranged so that the main surface 411 faces the front direction. In other words, it can be said that the printed circuit board 41 is arranged such that the direction in which the thickness t1 (see FIG. 5) extends along the front-rear direction (horizontal direction). In this specification, “extending along the front-rear direction (horizontal direction)” not only extends exactly in the front-rear direction (horizontal direction) but also extends slightly inclined with respect to the front-rear direction (horizontal direction). It is interpreted as including cases.

(1-2-8-2) Outdoor unit controller 42
The outdoor unit control unit 42 includes a microcomputer configured with a CPU, a memory, and the like. The outdoor unit control unit 42 is connected to the indoor unit control unit 14 via the cable C1, and transmits and receives signals to and from each other. When the outdoor unit control unit 42 receives a predetermined signal from the indoor unit control unit 14, the outdoor unit control unit 42 performs processing corresponding to the signal. The outdoor unit controller 42 is electrically connected to an inverter controller 51 (described later) of the actuator drive unit 43, and transmits and receives signals to and from each other.

(1-2-8-3) Actuator drive unit 43
FIG. 4 is a schematic configuration diagram of the actuator drive unit 43. The actuator drive unit 43 is a drive circuit for controlling the operation of the actuator disposed in the outdoor unit 20, and is a motor drive circuit for controlling the drive of the compressor motor 22a or the outdoor fan motor 25a, for example. The actuator drive unit 43 is electrically connected to the external power source 110 and is supplied with the AC voltage Vac from the external power source 110. The actuator drive unit 43 mainly includes a CMC (common mode choke coil) 44, a rectifier 45, a reactor 46, a smoothing capacitor 47, a voltage detector 48, a current detector 49, an inverter 50, and inverter control. Part 51.

  The CMC 44 is an electrical component for removing so-called common mode noise from the power output from the external power supply 110. The CMC 44 is disposed between the external power supply 110 and the rectifying unit 45. The CMC 44 has a core and a coil wound around the core.

  The rectifying unit 45 is a functional unit that converts the AC voltage Vac into the DC voltage Vdc. The rectifying unit 45 is configured in a bridge shape by four rectifying diodes (hereinafter simply referred to as “diodes”) D1a, D1b, D2a, and D2b.

  The reactor 46 is disposed on the cathode side of the diodes D1a and D2a. Reactor 46 generates reactance in the power rectified by rectification unit 45. Reactor 46 has a core and a coil wound around the core.

The smoothing capacitor 47 is arranged in parallel with the rectifying unit 45 in the subsequent stage of the reactor 46. The smoothing capacitor 47 smoothes the voltage rectified by the rectifying unit 45. The voltage smoothed by the smoothing capacitor 47 becomes a DC voltage Vdc with low ripple.
The DC voltage Vdc is supplied to the inverter 50.

  The voltage detection unit 48 is connected in parallel to the smoothing capacitor 47 on the output side of the smoothing capacitor 47. The voltage detection unit 48 detects the value of the supplied DC voltage Vdc. The voltage detection unit 48 has a configuration in which the DC voltage Vdc is divided by, for example, two resistors connected in series with each other. The voltage value at the connection point connecting the two resistors is input to the inverter control unit 51 as a value obtained by multiplying the DC voltage Vdc by a predetermined voltage dividing ratio.

  The current detection unit 49 is connected between the smoothing capacitor 47 and the inverter 50 and connected to the negative output terminal side of the smoothing capacitor 47. The current detector 49 detects the motor current Im flowing through the compressor motor 22a (or the outdoor fan motor 25a). The current detection unit 49 includes, for example, a shunt resistor and an operational amplifier.

  The inverter 50 is a functional unit that outputs drive voltages SU, SV, and SW for driving the compressor motor 22a (or the outdoor fan motor 25a). The inverter 50 is connected to the output side of the smoothing capacitor 47. The inverter 50 includes a plurality (six) insulated gate bipolar transistors (hereinafter simply referred to as transistors) 501, 502, 503, 504, 505 and 506, and a plurality (six) freewheeling diodes D3a, D3b, D4a, D4b, D5a and D5b.

  The inverter 50 is supplied with a DC voltage Vdc. The inverter 50 generates drive voltages SU, SV, and SW having a desired duty by turning on and off the transistors 501 to 506 at a predetermined timing by the inverter control unit 51. The generated drive voltage SU is output from the connection point NU between the transistors 501 and 502. The generated drive voltage SV is output from the connection point NV between the transistors 503 and 504. The generated drive voltage SW is output from the connection point NW between the transistors 505 and 506.

  The inverter control unit 51 is a microcomputer including a CPU and a memory. The inverter control unit 51 is electrically connected to the outdoor unit control unit 42, the voltage detection unit 48, the current detection unit 49, and the inverter 50. The inverter control unit 51 determines the timing for turning on and off the transistors 501 to 506 of the inverter 50 based on the detection results of the voltage detection unit 48 and the current detection unit 49, and gate control voltages Gu and Gx at the timing. , Gv, Gy, Gw and Gz are output.

(1-2-8-4) Heating component The outdoor electrical component unit 40 including the outdoor unit control unit 42 and the actuator driving unit 43 as described above includes a plurality of heat generating components that generate heat when energized. Examples of the heat generating components included in the outdoor electrical component unit 40 include diodes (D1a, D1b, D2a, and D2b) included in the rectifying unit 45 and transistors (501, 502, 503, 504, 505, and 506) included in the inverter 50, for example. ) (Hereinafter, these are collectively referred to as “power device PD1”). Further, a power module having a plurality of power devices PD1 (hereinafter, collectively referred to as “power module PM1”), such as the rectifier 45 and the inverter 50, may be mentioned. In addition to the power device PD1, coil components such as the CMC 44 and the reactor 46 (hereinafter collectively referred to as “coil components CP1”) also correspond to heat generating components.

  In order to suppress the adverse effects caused by the heat generated by these heat-generating components during operation, the outdoor unit 20 is provided with a heat sink 60 (corresponding to the “heat radiator” described in the claims), and the power device during operation. Heat generating components such as PD1, power module PM1, and coil component CP1 are cooled by a heat sink 60.

  The details of each heat generating component will be described later in “(3) Details of heat generating component included in outdoor electrical equipment unit 40”.

(1-2-9) Heat sink 60
FIG. 5 is an enlarged view of a portion A in FIG. FIG. 6 is an external view of the portion A of FIG. 3 when viewed from the front (the fifth pipe P5 and the cover portion 622 are not shown).

  The heat sink 60 is a radiator that cools various heat generating components included in the outdoor electrical component unit 40. The heat sink 60 is disposed adjacent to the printed circuit board 41 on the front side of the printed circuit board 41. The heat sink 60 mainly includes a heat radiating plate 61 and a refrigerant jacket 62.

(1-2-9-1) Heat sink 61
The heat radiating plate 61 is a plate-like member formed of a material having high heat conductivity (for example, a metal such as aluminum or a synthetic resin). As shown in FIG. 5, the heat radiating plate 61 is arranged such that the thickness direction of the thickness t <b> 2 extends along the front-rear direction (horizontal direction).

  The heat radiating plate 61 has a first flat surface portion 611 and a second flat surface portion 612 that are in a positional relationship with each other. The first flat surface portion 611 (corresponding to “back side surface” in the claims) corresponds to the back surface of the heat radiating plate 61 and faces the back surface direction. The second plane portion 612 (corresponding to “front side surface” described in the claims) corresponds to the front surface of the heat radiating plate 61 and faces the front direction. The first plane portion 611 and the second plane portion 612 extend substantially parallel to the main surface 411 of the printed circuit board 41. The heat radiating plate 61 is in thermal contact with the heat generating components such as the power device PD1, the power module PM1, and the coil component CP1 in the first plane portion 611.

  Here, in the following description, for convenience of description, a contact portion of the first flat portion 611 with the power module PM1 and the power device PD1 is referred to as a first contact portion 613 and is in contact with the coil component CP1. This portion is referred to as a second contact portion 614. The heat radiating plate 61 has a plurality of first abutting portions 613 (corresponding to “first abutting surfaces” in claims) and a plurality of second abutting portions on a first plane portion 611 that is the same plane. A portion 614 (corresponding to a “second contact surface” recited in the claims) is configured.

  The heat radiating plate 61 includes a first distance d1 that is the shortest distance between each first contact portion 613 and the main surface 411 of the printed circuit board 41, and a shortest distance between each second contact portion 614 and the main surface 411 of the printed circuit board 41. The second distance d2 that is the distance is substantially the same. In this specification, there is a slight error even when the lengths of the first distance d1 and the second distance d2 are completely the same, and even when the lengths of the first distance d1 and the second distance d2 are different. When it is not too much, it is interpreted that the first distance d1 and the second distance d2 are substantially the same. In the present embodiment, it is assumed that the first distance d1 and the second distance d2 are set to 10 mm.

  Further, the heat radiating plate 61 is in thermal contact with the refrigerant jacket 62 in the second plane portion 612. Here, for convenience of description, in the following description, a contact portion of the second flat surface portion 612 of the heat radiating plate 61 with the refrigerant jacket 62 is referred to as a third contact portion 615. The third contact portion 615 is located on the front side of the plurality of first contact portions 613. That is, the plurality of first abutting portions 613 and the third abutting portion 615 are in a positional relationship with each other.

  In the present embodiment, it is assumed that the heat radiating plate 61 is manufactured by extrusion molding in order to suppress an increase in manufacturing cost.

(1-2-9-2) Refrigerant jacket 62
The refrigerant jacket 62 is a member for thermally connecting the heat radiating plate 61 and the fifth pipe P5. The refrigerant jacket 62 is formed of a material having high heat conductivity (for example, a metal such as aluminum or a synthetic resin). In the present embodiment, it is assumed that the refrigerant jacket 62 is manufactured by extrusion molding in order to suppress an increase in manufacturing cost. The refrigerant jacket 62 accommodates a part of the first vertical part 31 and the second vertical part 32 of the fifth pipe P5 on the front side of the heat radiating plate 61. The refrigerant jacket 62 includes a pipe contact portion 621 and a cover portion 622.

  The pipe contact part 621 is a member extending in the vertical direction, and is disposed between the second flat part 612 of the heat radiating plate 61 and the cover part 622. The pipe contact portion 621 is screwed to the heat radiating plate 61. The pipe contact portion 621 is in contact with the third contact portion 615 of the second flat surface portion 612. From a different viewpoint, it can be said that the heat sink 60 includes the pipe contact portion 621 in the second flat surface portion 612 of the heat radiating plate 61.

  The pipe contact part 621 is formed with fitting parts fp1 and fp2 extending in the vertical direction on the front side. The fitting parts fp <b> 1 and fp <b> 2 are curved in a shape in which a part of the first vertical part 31 or the second vertical part 32 is fitted. The pipe contact part 621 is in thermal contact with a part of the outer periphery of the first vertical part 31 at the fitting part fp1. In addition, the pipe contact portion 621 is in thermal contact with a part of the outer periphery of the second vertical portion 32 at the fitting portion fp2.

  In the present embodiment, the pipe abutting portion 621 is disposed so as to abut on the third abutting portion 615, so that in the installed state, a part of the first vertical portion 31 or the second vertical portion 32 is a power device. It is thermally connected to the back side of the first contact portion 613 where the PD 1 and the power module PM 1 are in contact. As a result, heat exchange between the power device PD1 and the power module PM1 and the fifth pipe P5 is promoted compared to the case where the pipe contact portion 621 is disposed in another part. Yes.

  The cover portion 622 is a member that covers the first vertical portion 31 and the second vertical portion 32 that are in contact with the pipe contact portion 621 from the front side. The cover part 622 extends in the vertical direction. The cover part 622 is exhibiting the shape bent in the several location according to planar view. The cover part 622 is screwed to the pipe contact part 621.

(2) Refrigerant Flow During Operation of Air Conditioner 100 Next, a refrigerant flow during operation of the air conditioner 100 will be described.

(2-1) Cooling Operation During the cooling operation, the four-way switching valve 23 is switched to the cooling cycle state (state indicated by the solid line in FIG. 1). When the compressor 22 is driven, low-pressure gas refrigerant is sucked into the compressor 22 via the second pipe P2, and is discharged after being compressed. The high-pressure gas refrigerant discharged from the compressor 22 flows through the third pipe P3, the four-way switching valve 23, and the fourth pipe P4 and flows into the outdoor heat exchanger 24.

  The high-pressure gas refrigerant that has flowed into the outdoor heat exchanger 24 is condensed by exchanging heat with the air flow generated by the outdoor fan 25 to become a high-pressure liquid refrigerant and flows out of the outdoor heat exchanger 24. The liquid refrigerant that has flowed out of the outdoor heat exchanger 24 flows through the fifth pipe P5. At this time, the refrigerant exchanges heat with the heat sink 60 (refrigerant jacket 62) in the process of flowing through the first vertical portion 31 and the second vertical portion 32 of the fifth pipe P5. In other words, the refrigerant that passes through the first vertical portion 31 and the second vertical portion 32 of the fifth pipe P5 is a heat-generating component (power device PD1, power device PD1) included in the outdoor electrical component unit 40 via the heat sink 60 (refrigerant jacket 62). Heat exchange with the power module PM1 and the coil component CP1). As a result, the heat generating components (power device PD1, power module PM1, coil component CP1, etc.) that generate heat during the cooling operation are radiated and cooled.

  The refrigerant that has passed through the fifth pipe P5 flows into the expansion valve 26 and is depressurized. Thereafter, the refrigerant flows into the indoor heat exchanger 11 through the sixth pipe P6, the liquid side closing valve 27, and the liquid refrigerant pipe LP. The refrigerant that has flowed into the indoor heat exchanger 11 evaporates into a gas refrigerant by exchanging heat with the air flow generated by the indoor fan 12. The gas refrigerant flowing out from the indoor heat exchanger 11 flows through the gas refrigerant pipe GP, the gas side shut-off valve 28, the first pipe P1 and the second pipe P2, and is sucked into the compressor 22.

(2-2) Heating Operation During the heating operation, the four-way switching valve 23 is switched to the heating cycle state (the state indicated by the broken line in FIG. 1). When the compressor 22 is driven, low-pressure gas refrigerant is sucked into the compressor 22 via the second pipe P2, and is discharged after being compressed. The high-pressure gas refrigerant discharged from the compressor 22 flows into the indoor heat exchanger 11 through the third pipe P3, the four-way switching valve 23, the first pipe P1, the gas-side closing valve 28, and the gas refrigerant pipe GP. To do.

  The high-pressure gas refrigerant that has flowed into the indoor heat exchanger 11 is condensed by exchanging heat with the air flow generated by the indoor fan 12 and becomes high-pressure liquid refrigerant, and then flows out of the indoor heat exchanger 11. The liquid refrigerant that has flowed out of the indoor heat exchanger 11 flows through the liquid refrigerant pipe LP, the liquid side shut-off valve 27, and the sixth pipe P6, flows into the expansion valve 26, and is depressurized.

  The refrigerant that has passed through the expansion valve 26 flows through the fifth pipe P5. At this time, the refrigerant exchanges heat with the heat sink 60 (refrigerant jacket 62) in the process of flowing through the first vertical portion 31 and the second vertical portion 32 of the fifth pipe P5. In other words, the refrigerant that passes through the first vertical portion 31 and the second vertical portion 32 of the fifth pipe P5 is a heat-generating component (power device PD1, power device PD1) included in the outdoor electrical component unit 40 via the heat sink 60 (refrigerant jacket 62). Heat exchange with the power module PM1 and the coil component CP1). Thereby, the heat-generating components (power device PD1, power module PM1, coil component CP1, etc.) that generate heat during the heating operation are radiated and cooled.

  The refrigerant that has passed through the fifth pipe P5 flows into the outdoor heat exchanger 24. The refrigerant flowing into the outdoor heat exchanger 24 evaporates into a gas refrigerant by exchanging heat with the air flow generated by the outdoor fan 25. The gas refrigerant that has flowed out of the outdoor heat exchanger 24 flows through the fourth pipe P4, the four-way switching valve 23, and the second pipe P2, and is sucked into the compressor 22.

(3) Details of Heating Components Included in Outdoor Electrical Equipment Unit 40 In the present embodiment, the power device PD1 and the power module PM1 have leads L1 that extend in the front-rear direction and are connected to the printed circuit board 41. The power device PD1 and the power module PM1 are screwed to the heat radiating plate 61 with screws S1. Thereby, power device PD1 and power module PM1 and the 1st plane part 611 of the heat sink 61 are closely_contact | adhered.

  The plurality of power devices PD <b> 1 and the power module PM <b> 1 are arranged side by side in the vertical direction on the main surface 411 of the printed circuit board 41. Specifically, the plurality of power devices PD1 and the power module PM1 are arranged along the vertical direction in which the refrigerant jacket 62 extends (see FIG. 6). That is, three or more heat generating components are arranged along the longitudinal direction (vertical direction) of the pipe contact portion 621 of the refrigerant jacket 62. This is based on the following reason.

  Among the heat generating components included in the outdoor electrical component unit 40, the power device PD1 and the power module PM1 have a larger amount of heat generation when energized than the coil component CP1. For this reason, the power device PD1 and the power module PM1 need to promote cooling more than the coil component CP1. In view of this point, the power device PD1 and the power module PM1 are in contact with the back side of the third contact portion 615 of the heat sink 61 with which the refrigerant jacket 62 contacts. As a result, the power device PD1 and the power module PM1 are disposed closer to the fifth pipe P5 than the coil component CP1, and cooling is further promoted.

  The coil component CP1 has a lead L2 that extends in the front-rear direction and is connected to the printed circuit board 41.

  FIG. 7 is an external perspective view of the coil component CP1 (the lead L2 is not shown). The coil component CP <b> 1 includes a coil 55 and a core 56 around which the coil 55 is wound.

  The coil 55 is made of, for example, a copper wire or an enameled wire. A part of the coil 55 is accommodated in the core 56.

  The core 56 has a substantially rectangular parallelepiped outer shape. The core 56 has a drum core 57 around which the coil 55 is wound at the center portion. The core 56 is formed with openings 58 through which the coil 55 passes on the left and right sides of the drum core 57. Further, the core 56 has a mounting portion 59.

  The attachment portion 59 is a portion for fixing the coil component CP1 and the heat radiating plate 61, and a portion for contacting the heat radiating plate 61 and thermally connecting the coil component CP1 and the heat radiating plate 61. The attachment portion 59 is formed in a flat plate shape from a material having high heat conductivity such as metal or synthetic resin.

  The attachment portion 59 is formed with a plurality of screw holes TH1. The attachment portion 59 is screwed with the heat radiating plate 61 and the screw S2 through the screw hole TH1. Thereby, coil component CP1 and the 1st plane part 611 of the heat sink 61 are closely_contact | adhered.

  The attachment portion 59 has a flat plate shape. The attachment portion 59 has a flat surface portion 591 (corresponding to “a flat surface portion” described in claims), which is a main surface on the front side, and abuts against the heat radiating plate 61 at the flat surface portion 591. The flat portion 591 extends substantially parallel to the first flat portion 611 of the heat sink 61. In this specification, the phrase “extends substantially parallel to the first plane part 611” not only refers to the case of extending completely parallel to the first plane part 611, but also to the first plane part 611. It is interpreted as including the case of extending slightly inclined.

  Further, the planar portion 591 of the attachment portion 59 is configured to have a larger area than the core 56 when viewed from the front direction (the heat radiating plate 61 side). As a result, the coil component CP1 has a sufficient heat transfer area with the heat radiating plate 61, and as a result, cooling of the coil component CP1 is promoted.

  In the printed circuit board 41, a plurality of coil components CP1 are arranged so as to be aligned along the vertical direction. The coil component CP1 is arranged so that most of the coil component CP1 does not overlap with the refrigerant jacket 62 when viewed from the front direction or the rear direction (that is, the main surface 411 direction). Specifically, when the coil component CP <b> 1 is viewed from the direction of the main surface 411, the core 56 and the coil 55 are detached from the refrigerant jacket 62.

  Here, when the coil component CP1 is cooled by natural air cooling, heat generation is generally suppressed by adopting a thick coil as the coil 55 to reduce loss. In such a case, when securing the number of turns of the coil 55, the size of the coil component CP1 is easily increased, and the weight is easily increased, so that mounting on the printed circuit board 41 is difficult.

  However, in this embodiment, the coil component CP1 is sufficiently cooled during operation by being thermally connected to the heat sink 60, and even if a thick coil is not adopted as the coil 55, the temperature rise is suppressed. Yes. Thereby, the compactness and weight reduction of the coil component CP1 are promoted, and as a result, the coil component CP1 can be mounted on the printed circuit board 41 together with the power device PD1 and the power module PM1.

(4) Support function of 5th piping P5 In this embodiment, as for the printed circuit board 41, the thickness direction of thickness t1 is extended along the front-back direction (horizontal direction). Similarly, in the heat sink 61 of the heat sink 60, the thickness direction of the thickness t2 extends along the front-rear direction (horizontal direction). That is, the printed circuit board 41 on which various electrical components are mounted and the heat radiating plate 61 are erected in the outdoor unit casing 21.

  Since the printed circuit board 41 and the heat radiating plate 61 are adjacent to each other and are in contact with each other via heat-generating components that are in contact with the first contact portion 613 and the second contact portion 614, loads are applied to each other depending on the situation. There is a relationship. For example, when the outdoor unit 20 is tilted in either the front or rear direction during transportation of the outdoor unit 20 or the like, a load is applied from the printed circuit board 41 to the heat radiating plate 61 via the first contact portion 613 and the second contact portion 614. It is easy to start.

  Here, in the present embodiment, the fifth pipe P5 extends in the vertical direction on the front side of the heat radiating plate 61 (the side opposite to the printed circuit board 41), and in the first vertical portion 31 and the second vertical portion 32, It is in contact with the heat sink 60. As a result, the heat sink 60 on which the load of the printed circuit board 41 is easily applied is supported from the front side (the side on which gravity acts) by the first vertical part 31 and the second vertical part 32.

  For example, when the outdoor unit casing 21 is tilted in either the front or rear direction, even if the heat radiating plate 61 receives a load from the printed circuit board 41, the heat radiating plate 61 is supported by the first vertical portion 31 and the second vertical portion 32. Thus, the printed circuit board 41 and the heat sink 60 can easily maintain the posture at the time of installation. That is, the fifth pipe P5 plays a role of supporting the printed circuit board 41 and the heat sink 60, separately from the role of circulating the refrigerant.

(5) Features (5-1)
In the above embodiment, the coil component CP1 is thermally connected to the second contact portion 614 of the heat sink 61. That is, the air conditioner 100 is configured such that the coil component CP1 is cooled by the heat sink 60 during operation. Thereby, even if it does not employ | adopt especially a thick coil as the coil 55, the temperature rise of coil component CP1 is suppressed. As a result, the coil component CP1 is made compact and lightweight, and the coil component CP1 can be mounted on the printed circuit board 41 on which the power device PD1 and the power module PM1 are mounted. For this reason, the harness for connecting coil component CP1 and each electrical component required when coil component CP1 is arrange | positioned away from the printed circuit board 41 is unnecessary.

(5-2)
In the above embodiment, the heat sink 60 includes the first distance d1 that is the shortest distance between the first contact portion 613 of the heat radiating plate 61 and the main surface 411 of the printed circuit board 41, and the second contact portion 614 and the printed circuit board 41. The second distance d2, which is the shortest distance from the main surface 411, is the same, and is in contact with the fifth pipe P5. As a result, the heat sink 60 can satisfy sufficient heat dissipation performance to cool the power device PD1, the power module PM1, and the coil component CP1, even if the size of the heat sink 60 is not particularly large.

(5-3)
In the embodiment, the thickness direction of the thickness t1 of the printed circuit board 41 extends in the front-rear direction (horizontal direction), and the first vertical portion 31 and the second vertical portion 32 of the fifth pipe P5 are the pipe contact portions of the heat sink 60. 621 is in contact. As a result, the first vertical portion 31 and the second vertical portion 32 are connected to the pipe contact portion 621 by the heat sink 60 that is easily subjected to a load from the printed circuit board 41 via the first contact portion 613 and the second contact portion 614. It supports in the contact part. As a result, the printed circuit board 41 on which the power device PD1, the power module PM1, and the coil component CP1 are mounted, and the heat sink 60 are configured so as to easily maintain the posture at the time of installation.

(5-4)
In the above-described embodiment, the printed circuit board 41 includes three or more heat generating components (power device PD1 and power module PM1) arranged in the vertical direction on the main surface 411, so that the pipe contact portion 621 of the heat sink 60 is arranged. It is lined up along the longitudinal direction. As a result, heat exchange between each heat generating component (power device PD1 and power module PM1), heat sink 60, and fifth pipe P5 is promoted.

(5-5)
In the above embodiment, the coil component CP <b> 1 has the flat surface portion 591 that extends substantially parallel to the second contact portion 614 and contacts the second contact portion 614. Thereby, the heat transfer area between the coil component CP1 and the heat sink 60 is sufficiently ensured, and heat exchange is promoted.

(6) Modification (6-1) Modification A
In the said embodiment, although this invention was applied to the air conditioner 100 as a freezing apparatus, it is not limited to this, You may apply to another freezing apparatus. For example, the present invention may be applied to a heat pump system such as a water heater or a dehumidifier. Further, the present invention may be applied to a ventilation device, an air cleaner, or the like.

(6-2) Modification B
In the embodiment described above, the heat sink 60 is disposed in the outdoor unit 20 in order to cool the heat generating components included in the outdoor electrical component unit 40. However, the present invention is not limited to this, and the heat sink 60 may be disposed in the indoor unit 10 in order to cool a heat generating component included in the indoor fan motor drive unit 15, for example.

(6-3) Modification C
In the embodiment described above, the first vertical portion 31 and the second vertical portion 32 of the fifth pipe P5 extend in the vertical direction. However, it is not limited to this, The 1st vertical part 31 and the 2nd vertical part 32 may be comprised so that it may extend along a horizontal direction. In this case, the heat radiating plate 61, the pipe contact portion 621 and the cover portion 622 of the refrigerant jacket 62 are configured to extend along the direction in which the first vertical portion 31 and the second vertical portion 32 extend.

(6-4) Modification D
In the above embodiment, the coil component CP1 is in direct contact with the second contact portion 614 of the heat radiating plate 61 at the flat surface portion 591 of the attachment portion 59. However, the present invention is not limited to this, and a heat transfer member having a high heat transfer property such as a heat dissipation sheet or heat dissipation grease may be interposed between the flat surface portion 591 and the second contact portion 614. Thereby, the heat exchange between the coil component CP1 and the heat sink 60 is further promoted.

(6-5) Modification E
In the above embodiment, each heat generating component (power module PM1, power device PD1, and coil component CP1) is arranged in a manner as shown in FIG. However, the arrangement of the heat generating components on the printed circuit board 41 is not particularly limited and can be selected as appropriate. For example, the plurality of power modules PM1, the power device PD1, and the coil component CP1 may be arranged in the vertical direction along the back side of the third contact portion 615. Alternatively, the heat generating components may be arranged so as to be arranged in the order in which the circuits are arranged, or the heat generating components may be arranged so as to be arranged in the descending order of heat generation.

(6-6) Modification F
In the above embodiment, the power device PD1, the power module PM1, and the coil component CP1 are described as examples of the heat generating components mounted on the printed circuit board 41. However, the heat generating components mounted on the printed circuit board 41 are not particularly limited. Anything can be used.

(6-7) Modification G
In the above embodiment, as the power device PD1, the transistors 501, 502, 503, 504, 505, and 506 and the diodes D1a, D1b, D2a, and D2b have been described as examples. It may be a power device.

  Moreover, although the rectification | straightening part 45 and the inverter 50 were mentioned as an example as power module PM1, it is not limited to this in particular, Another power module may be sufficient.

  Moreover, although CMC44 and the reactor 46 were mentioned as an example as coil component CP1, it is not limited to this in particular, Other components which have a coil may be sufficient.

(6-8) Modification H
The coil component CP1 in the above embodiment may be configured like the coil component CP2.

  FIG. 8 is a plan view showing a state in which the coil component CP2 is installed on the printed circuit board 41. FIG. The coil component CP2 has a core 56a instead of the core 56.

  Unlike the core 56, the attachment portion 59 is omitted in the core 56a. For this reason, the core 56 a is shorter in the front-rear direction than the core 56. As a result, when the core 56a is installed on the printed circuit board 41, a clearance is generated between the core 56a and the first flat portion 611 of the heat sink 61. However, the heat transfer sheet 70 that fills the clearance has the core 56a. It is arranged in the front part.

  The heat transfer sheet 70 (corresponding to a “heat transfer member” in the claims) is a member made of a synthetic resin having a high heat transfer property, also called a heat dissipation sheet. The heat transfer sheet 70 is formed into a sheet shape. The heat transfer sheet 70 is interposed between the heat radiating plate 61 and the coil component CP2 (coil 55). The heat transfer sheet 70 is in contact with the coil component CP2 at the back side portion and is in contact with the heat radiating plate 61 at the front side portion. .

  Thereby, the heat sink 61 (2nd contact part 614) and coil component CP2 are thermally connected via the heat-transfer sheet | seat 70, and cooling of coil component CP2 is accelerated | stimulated.

  In addition, the heat radiating plate 61 and the coil component CP2 are thermally connected by interposing another heat transfer member such as heat radiating grease instead of the heat transfer sheet 70 between the heat radiating plate 61 and the coil component CP2. May be.

(6-9) Modification I
The coil component CP1 in the above embodiment may be configured like the coil component CP3.

  FIG. 9 is a plan view showing a state where the coil component CP3 is installed on the printed circuit board 41. FIG. The coil component CP3 has a core 56b around which the coil 55a is wound instead of the core 56 around which the coil 55 is wound. Unlike the core 56, the core 56b is a toroidal core and has a ring shape.

  The core 56b has a shorter length in the front-rear direction than the core 56. As a result, when the core 56b is installed on the printed circuit board 41, a clearance is generated between the core 56b and the first flat surface portion 611 of the heat radiating plate 61. However, the heat transfer sheet 71 that fills the clearance is provided on the core 56b. It is arranged in the front part.

  The heat transfer sheet 71 (corresponding to a “heat transfer member” in the claims) is a member made of synthetic resin having a high heat transfer property, also called a heat dissipation sheet. The heat transfer sheet 71 is formed into a sheet shape. The heat transfer sheet 71 is interposed between the heat radiating plate 61 and the coil component CP3 (coil 55a), contacts the coil component CP3 (coil 55a and the core 56a) at the back side portion, and radiates heat at the front side portion. It is in contact with the plate 61.

  Thereby, the heat sink 61 (2nd contact part 614) and coil component CP3 are thermally connected via the heat-transfer sheet | seat 71, and cooling of coil component CP3 is accelerated | stimulated.

  It should be noted that the heat radiating plate 61 and the coil component CP3 are thermally connected by interposing another heat transfer member such as heat radiating grease instead of the heat transfer sheet 71 between the heat radiating plate 61 and the coil component CP3. May be.

(6-10) Modification J
In the said embodiment, the heat sink 61 and the refrigerant | coolant jacket 62 demonstrated as what is manufactured by extrusion molding. However, it is not limited to this, The heat sink 61 or the refrigerant | coolant jacket 62 may be manufactured by another manufacturing method, for example, may be manufactured using a casting_mold | template and may be manufactured by press work.

(6-11) Modification K
In the said embodiment, 1st distance d1 and 2nd distance d2 demonstrated as what is set to 10 mm. However, the first distance d1 and the second distance d2 are not particularly limited to this, and may be set to other lengths. For example, the first distance d1 and the second distance d2 may be set to 8 mm or 15 mm. That is, the first distance d1 and the second distance d2 may be appropriately set according to the dimensions of each heat generating component (power device PD1, power module PM1, and coil component CP1).

(6-12) Modification L
In the above embodiment, in the heat sink 60, the refrigerant jacket 62 is disposed so that the third contact portion 615 is located on the back side of the first contact portion 613. However, the present invention is not limited to this, and the refrigerant jacket 62 may be arranged such that the third contact portion 615 is located on the back side of the second contact portion 614.

(6-13) Modification M
In the said embodiment, the printed circuit board 41 or the heat sink 61 was arrange | positioned so that the thickness direction of thickness t1 or thickness t2 may extend along the front-back direction (horizontal direction). However, the present invention is not limited to this, and the printed circuit board 41 or the heat radiating plate 61 may be arranged such that the thickness direction of the thickness t1 or the thickness t2 extends along the left-right direction (horizontal direction). Further, the printed circuit board 41 or the heat radiating plate 61 may be arranged such that the thickness direction of the thickness t1 or the thickness t2 extends along the vertical direction (vertical direction).

(6-14) Modification N
The heat sink 60 in the above embodiment can also be configured like a heat sink 60a shown in FIGS. Hereinafter, the heat sink 60a will be described.

  FIG. 10 is a front view of the heat sink 60a. FIG. 11 is a plan view of the heat sink 60a.

  The heat sink 60 a further includes a plurality of heat radiation fins 80 in addition to the configuration of the heat sink 60. Each radiating fin 80 is configured by molding a highly heat-conductive material (for example, a metal such as aluminum or a synthetic resin) into a plate shape.

  Each radiating fin 80 is disposed on the right side of the third contact portion 615 of the radiating plate 61. Each radiating fin 80 protrudes forward from the second plane portion 612 and extends in a direction (front-rear direction) intersecting with a direction (left-right direction) in which the heat radiating plate 61 extends in a plan view. That is, each radiation fin 80 extends in a direction intersecting the main surface 411 of the printed circuit board 41 in plan view.

  Other configurations of the heat sink 60 a are substantially the same as those of the heat sink 60.

  In the heat sink 60 a, the plurality of heat radiation fins 80 are arranged, so that the amount of heat exchange with air is increased as compared with the heat sink 60. As a result, the heat dissipation amount of the heat sink 60a increases, and cooling of each heat generating component is further promoted.

(6-15) Modification O
In the above embodiment, the heat sink 60 is configured such that the heat radiating plate 61 and the pipe contact portion 621 are separate. However, the heat radiating plate 61 and the pipe contact portion 621 may be integrally formed.

(6-16) Modification P
In the above embodiment, the refrigerant jacket 62 has the pipe contact portion 621 and the cover portion 622. However, the refrigerant jacket 62 may omit the pipe contact portion 621. In such a case, the fifth pipe P5 may be configured to abut on the second flat surface portion 612 of the heat radiating plate 61. More specifically, in the second flat surface portion 612 of the heat radiating plate 61, a groove that is curved into a shape in which a part of the outer periphery of the fifth pipe P5 can be fitted is formed, and the fifth pipe P5 is fitted into the groove. What is necessary is just to comprise so. Moreover, the cover part 622 should just be fixed to the heat sink 61 by screwing etc. FIG.

(6-17) Modification Q
In the above embodiment, the power module PM1 and the coil component CP1 are screwed to the heat radiating plate 61. However, the power module PM1 and the coil component CP1 do not necessarily need to be screwed to the heat sink 61 as long as they are thermally connected to the heat sink 61.

  The present invention is applicable to a refrigeration apparatus.

20: Outdoor unit 21: Outdoor unit casing 22: Compressor 22a: Compressor motor 25: Outdoor fan 25a: Outdoor fan motor 31: First vertical portion 32: Second vertical portion 40: Outdoor electrical component unit 41: Printed circuit board ( substrate)
42: Outdoor unit control unit 43: Actuator drive unit 45: Rectifying unit 46: Reactor 50: Inverter 55, 55a: Coil 56, 56a, 56b: Core 57: Drum core 58: Opening 59: Mounting portion 60, 60a: Heat sink (heat dissipation) vessel)
61: Heat dissipation plate 62: Refrigerant jacket 70, 71: Heat transfer sheet (heat transfer member)
80: Radiating fin 100: Air conditioner (refrigeration equipment)
411: Main surfaces 501 to 506: Transistor 591: Plane portion 611: First plane portion (back side surface)
612: 2nd plane part (front side)
613: 1st contact part (1st contact surface)
614: 2nd contact part (2nd contact surface)
615: 3rd contact part 621: Pipe contact part 622: Cover part CP1, CP2, CP3: Coil parts (heat-generating part)
D1a, D1b, D2a, D2b: Diodes L1, L2: Lead P5: Fifth pipe (refrigerant pipe)
PD1: Power device (heat generating component)
PM1: Power module (heat generating component)
S1, S2: Screw TH1: Screw hole d1: First distance d2: Second distance fp1, fp2: Fitting portions t1, t2: Thickness

JP 2010-175224 A

Claims (5)

A substrate (41) on which a plurality of heat generating components (PD1, PM1, CP1, CP2, CP3) are mounted;
A refrigerant pipe (P5) through which the refrigerant flows;
A radiator (60, 60a) in contact with the heat generating component and the refrigerant pipe;
With
The substrate is mounted with a power device (PD1) and coil components (CP1, CP2, CP3) as the heat generating component on a main surface (411),
The radiator is
Adjacent to the substrate,
A back side surface (611) including a first contact surface (613) thermally connected to the power device and a second contact surface (614) thermally connected to the coil component; the refrigerant pipe; A front side surface (612) including a pipe contact portion (621) to be contacted,
The shortest distance (d1) between the first contact surface and the main surface is the same as the shortest distance (d2) between the second contact surface and the main surface.
Refrigeration apparatus (100). The refrigerant pipe includes vertical portions (31, 32) extending in a vertical direction,
The vertical portion is in contact with the pipe contact portion,
The substrate has a thickness direction (t1) extending along a horizontal direction.
The refrigeration apparatus (100) according to claim 1. The substrate is arranged such that three or more heat generating components are arranged in a vertical direction on the main surface.
The refrigeration apparatus (100) according to claim 1 or 2. The coil component (CP1) has a core (56) around which a coil (55) is wound,
The core is provided with a flat surface portion (591) that comes into contact with the second contact surface.
The refrigeration apparatus (100) according to any one of claims 1 to 3. The coil parts (CP2, CP3) have coils (55, 55a),
A heat transfer member (70, 71) is disposed between the coil and the second contact surface,
The second contact surface is thermally connected to the coil component via the heat transfer member.
The refrigeration apparatus (100) according to any one of claims 1 to 3.

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